Cage for shredding-machines.



No. 792,485. PATENTED JUNE 13, 1905.

M. F. WILLIAMS. GAGE FOR SHRBDDING MACHINES.

minesses: 5 @W Patented June 13, 1905.

PATENT OTTTcs.

MILTON F. IVILLIAMS, OF ST. LOUIS, MISSOURI, ASSIGNOR TO WILLIAMS PATENTORUSIIER & PULVERIZER COMPANY, OF ST. LOUIS, MISSOURI,

A CORPORATION OF MISSOURI.

CAGE FOR SHREDDlNG-IVIACHINES- SPECIFICATION forming part of LettersPatent No. 792,485, dated June 13, 1905.

Application filed January 14, 1905. Serial No. 241,102.

To (bZZ whmn 717 may concern.-

Be it known that I, MILTON F. WILLIAMS, a citizen of the United States,residing at St. Louis, Missouri, have invented a certain new and usefulImprovement in Cages for Shredding-h lachines, of which the following isa full, clear, and exact description, such as will enable others skilledin the art to which it appertains to make and use the same, reference Iobeing had to the accompanying drawings, forming part of thisspecification, in which Figure 1 is a perspective view of a portion of acage, illustrating my improvement. Fig. 2 is an elevational viewthereof, and Fig. 3 is a sectional view on the line 3 3 of Fig. 2.

This invention relates to a new and useful improvement in cages forshreddingmachines, the object being to construct a cage for finegrinding or pulverizing whereby the grinding edges of the cage-bars maybe renewed quickly simply by turning the bars in their respectivesockets. l/Vhilel have shown the bars as being triangular in shape, itis obvious that square bars or bars of other polyg- 2 5 onal shapes canbe employed. It is desirable, however, to provide the bars withequiangular corners and symmetrical in shape, whereby they may be liftedout of their sockets, partially rotated, and reintroduced into their 3sockets, so as to present new cutting edges to the material. This is animportant element of my invention, because in fine shredding the sharpedges of the bars are quickly Worn and a great saving is effected bybeing able to change the position of the bars, so as to present newcutting edges instead of renewing the bars, as is frequently done. heretriangular bars are used, there are three adjustments amounting to thepresentation of 4 three new cuttingedges, and where square bars are usedit is possible to present four new cutting edges, &c.

Another object of my present invention is to so construct the mounts forthe cage-bars that they can be quickly and cheaply manufactured. Thedemands for finelyspaced cages in line shredding are such that calls aremade for cages having openings as small as one-twentieth of an inchbetween the bars.

It has been the practice to stamp or punch out the bar-mounts; but thisproceeding is slow and cumbersome, and, furthermore, the punch has to beadjusted for each new opening, so that not only does the metal stretch,but other irregularities are bound to exist, re- 5 5 sulting invariously sized and spaced openings between the bars. Another objectionto barmounts so constructed is the fact that where it is desired to havean opening of, say, onetwentieth of an inch between the bars there isnot enough material left in the bar-mount to hold it together, with theresult that the punching if it does not divide the bar longitudinallyleaves it in such shape on account of the web one-twentieth of an inchthick between the openings that it is desirable to file these openingsthrough in order to dispense with the irregularities resulting fromtheir presence, the separate parts of the bar-mounts so punched outbeing then riveted to a backing-plate.

My present invention contemplates the manufacture of bar-mounts by theuse of an ordinary gear-cutting machine in which a plurality ofbar-mounts can be simultaneously made, they being clamped together in awellknown manner, so that the gear-cutter can operate across theirrespective faces. After the bar-mounts are so produced according to thesizes of the bars to be mounted therein the said bar-mounts are rivetedto a backingplate, which is of such width as to accommodate akeeper-plate introduced above the bars to hold them in position.

With these objects in vieW the invention 5 consists in the construction,arrangement, and combination of the several parts, all as will behereinafter described, and afterward pointed out in the claims.

In the drawings, 1 indicates the backing- 9 plate, which is preferablycurved, so as to properly fit the curved groove in the side frame of themachine.

2 is the keeper-plate, which is preferably a. plain bar secured onto thebacking-plate 1 at its upper edge, so that the said keeper-plate can beremoved for the purpose of turning the bars.

3 indicates the bar-mount, which is prefer- I ably riveted to abacking-plate 1. I will describe the construction of this bar-mount withrespect to its adaptability to triangular bars; but it is obvious thatthis description applies equally to bars having a differentcross-section.

4: indicates the cage-bars, which are shown as triangular in shape thatis, the cutting edges are formed equi-angular and the bar is symmetricalin shape. One side of the seat in the bar-mount for the cage-bar-forinstance, the side 3-is equal to any side of the cage-bar which reststhereagainst. The opposite side of the seat 3" in the bar-mount isunequal in length with respect to any side of the cage-bar cooperatingtherewith and to the side 3. The greater length of the side 3"determines the size of the opening between the cage-bars, and it isobvious that it is possible by this construction to determine the sizeof the openings between the cage-bars with accuracy in order that all ofsaid openings between cage-bars may be uniform. For instance, in thedrawings the side 3 is equal to one of the sides of the triangular bar,while the side 3" is equal to another side of the triangular bar plusthe width of the opening. To increase or diminish the size of theopenings between the cage-bars, it is only necessary to change thelength of the side 3 When the bars are in position, they are held intheir seats by the keeper-platawhich bears against the cutting edge, andin order to enable the cage to be removed as an entirety I may usesecuring-screws 5, (shown by dotted lines in Fig. 3,) which pass throughthe back plate into the end bars and one or more intermediate bars.

1 am aware that minor changes in the construction, arrangement, andcombination of the several parts of my device can be made andsubstituted for those herein shown and described without in the leastdeparting from the nature and principle of my invention.

Having thus described the invention, what is claimed as new, and desiredto be secured by Letters Patent, is- 1. The combination with a backplate, of a bar-mount having bar-seats in its upper edge, the side wallsof the bar-seats being unequal the difference between the lengths of theside walls determining the space between the bars, bars in said seats,and a keeper for holding said.

. bars in the seats; substantially-as described.

2. The combination with a bar-mount hav ing seats in its upper edgewhose walls are of unequal lengths the diflerence between the lengths ofthe side walls determining the space between the bars, bars mounted insaid seats so as to present cutting edges, and means for holding saidbars in said seats; substantially as described.

3. The combination with a barrnount having bar-seats in one edge, theside walls of said seats being of unequal lengths, the differencebetween the lengths of said side walls determining the space between thebars, and bars in said seats; substantially as described.

4:. The combination with a bar-mount having \I-shape d bar-seats in oneedge, the walls of said seats being of unequal lengths, and triangularbars mounted in said seats; substantially as described.

5. The combination of a backing-plate, a bar-mount having \I-shapedseats in its upper edge, the side walls of said seats being of unequallengths, triangular bars mounted in said seats, anda keeper-platesecured to the backing-plate; substantially as described.

In testimony whereof I hereunto aflix my signature, in the presence oftwo witnesses, this 10th day of January, 1905.

MILTON F. HLLIAMS.

lVitnesses:

F. R. CORNWALL, (nrnone n BAR nwnLL.

